Removable mold for concrete floors.



CHARLES LUXS MEYER, F OMAHA, NEBRASKA.

' REMOVABLE TJIOLDFOR CONCREllEl FLOLS.

Appliction tiled July 31, 1912. Serial No. 712,455.

To (2.7/1 11h71 om, fr may Concern lie it known that l, CHARLES Louis Meren, a citizen of the United States, re-

siding at Omaha, in the county oi Douglas' Vject, broadly, to provide a novel means by use of which these floors may be convenientlv formed, and at less than ordinary expense.

The invention has. reference to a separable twopart mold, each part being formed of a metallic sheet bent to provide a substantially rectangulartop, and upright` sides with outwardly projecting, perforated, terminal flanges, one of the parts being provided with a closed end, said parts being convenient for disposal end-to-end in connected relation to provide forming-sections having closed ends.I the sections being disposed side-byside for the purpose of forming', in connection with the usual supply of concrete vand metallic reinforcing' material, a vcomplete concrete floor.

The invention also includesmeans to prevent "t skidding or longitudinal movement oi the parts-oit' the mold with reference to each other, and means to prevent spreading or collapsingy or a lateral movement of their upright walls, anddiscloses a constructionv by use of which the parts'of the mold may be readily removed from the concrete, after the door has'been completed.

The invention consists of the novel construction, combination and arrangement of parts as described herein and claimed, and as illustrated in the accompanying drawing, wherein-"- Figures l and 2 are, respectively, side and plan .views of the device. Fig. 3 is a broken. view lshowing the parts of rthe device arranged end-wend to provide a forming-A sec'tion, a part of a concrete door being added and in section.' Fig: 4e is a transverse` sectional view, partly broken, illustrating the use-of the device to provide the formingsections for the reinforced concrete-beams and floor. Fig. 5 is a view similar to that shown in Figi. et, the molds being removed, and the usual steel lath sheets and plaster Abeams 1l.

being added. Fig, 6 is a broken, plan view, on a. reduced scale, showing the device arranged end-to-end between two horizontal supporting-beams of a building, to provide a complete forlningsection.

, Referring now to the drawingr for a more particular description, the mold shown best in Figs. l and 2, consists of parts or por tions? and 8, and these parte may be used to. provide Aa forming-section 9, shown in Fig. 6. lFarts 7 and 8 are formedof metal, and each is provided with a substantially rectangular top a, upright' sides b with trans verse outwardly-projecting flanges c and, preferably, they are suitably curved as indicated at al, these curved portions occurring at the junction of the top and sides and at" the junction of the sides and danges; and part 8 is provided with an end portione which covers the area between its top and sides. `Wl1ile thetwo parts 7 and 8 are shown and may be used as a complete mold, it will be understood that they are separable, and a plurality of these molds may be eniployed to provide a support or formingsection 9 upon which may be laid the concrete for the door l0 and beams ll of a building.- i.

In practice, to form a reinforced concrete doonthe part-s 7 and 8 are disposed end-toend between the main, parallel supportingbeams 12 of ai building, the end oi' one part overlapping the end of the-other to provide a forming-section 9. The foi'ming-seciions will be disposedside-by-side, the dangges c which appear in one section overlapping; .the flanges o of an adjacent section to 'form therebetween parallel channels 18 (Fig. 6) for the formationV of floor beams 1l, a space being 'also formed between the ends e and the main supporting beams l2 which may be filled with concrete to form a cross-tie or connection lll (Fig: 3) between said loor For sustaining' the parts 7 and 8 to form the Hoor and beams 1l as described, any suitable planks l5 and posts 16 or like supports may be employed, care being; exercised so that the `flanges c of one forming-section will overlap the flanges 0 of an adj acentforminfresection, and that the lower part ofende e will be disposed near to or make. cont-act. with the ,lower part of rsupportiiig-beams 12. lt will be seen that the molds when arranged as described, provideendless troughs or channels in which the' required concrete material and usual metallic reinforcing bars or rods 17 may bel laid.

At f (Fig. 2) are indicated perforations formed at longitudinal intervals in flanges c.

'At 18 are indicated suitable wire strands supported by the rods 17 and which traverse the perforations; and after the molds have been removed, the sheets of steel lath 19 may be secured to lthe wire in a well known manner.

The plaster upon the lath .isv indicated at 20.

The two parts 7 and 8 may have any suitable length or width, and may be employed as illustrated in Fig. 6 where parts 8 are.`

disposed at the ends of the forming-sections, and plurality of parts 7 are disposed therel between. The mold may be constructed to advantage of sheet metal bent to the forms described, and to prevent spreading orlateral movements of the sides Z), adjustingrods 2l, of uniform length are employed. lhey are provided with terminal hooks g adapted to catch into ears or loops 22 formed in sides o. Loops 22 may be conveniently -provided by forming parallel incisions z' (Figi. 1) in sides Z1 adjacent to flanges c, and bending the material inwardly between said incisions, and as is obvious, other or diil'eront holders or loops may be provided. Any desired .number of adjustingrods may be employed, and as is apparent, the adjusting-rods when thiis mounted will operate to prevent spreading and will also pre-v vent sides from n'ioving toward each other when the conci-cte is laid iii channels 13. After the. concrete lloor y,and beams have been completed, the several parts 7 and S may be removed from the surface of the concrete. To ell'eet their removal, the adjusting-rods are disconnected from the loops after the wood blocking or supports 15 and 16 have been taken away, and the loops pro` vide inw ardlyl proj ectiiig holders for engagement with any suitable hooked implement .(iiot shown) for dislodging or separating said members 7 and 8 from the concrete.

The two-part implement thus described may be said to be of substantially inverted U-shape in cross-section, and it may be economically manufactured on account of its simple construction. Since it is made of metallic sheets it is of comparatively lightl struction facilitates the removal of said .members 7 and 8 from the floor and floor beams.

In order to prevent telescoping or sliding mbvements of members 7 and 8 which might be occasioned by stresses directed longitudinally thereof when laying the concrete to form the connections 14, any suitable coperating devices may be provided, the nioaiis herein shown for this purpose bethe upwardly-projectiiig lugs 28 formed in ilanges c of one member or part and 'adapted to bear upon the ends of the flanges of the adjacent member or part.

Having fiilly described my invention, what I claim and desire to secure by Letters y Patent is,

A mold for concrete floors comprising a body portion of inverted U shape ineross section, having horizontal outturiied iianges vextending` longitudinally along the' lower idges of its side walls, there being openings formed vertically through said flanges said openings being nearer to the side walls than to the outer edges of the lianges, whereby' when a plurality of said molds are arranged side by side to construct a floor with their flanges partially overlapping each other saidopenings may lie outside of said overlapping portion to permit the passage y of latliretaiiiing strands through said openings.

In testimony whereof I have affixed my signature in presence of two witnesses.

' CHARLES LOUIS MEYER. Witnesses: i i

Hiiiaii A. S'rUReiis, A, F. CLARK. 

